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@ARTICLE{Wang:887798,
      author       = {Wang, Liming and Missong, Anna and Amelung, Wulf and
                      Willbold, Sabine and Prietzel, Jörg and Klumpp, Erwin},
      title        = {{D}issolved and colloidal phosphorus affect {P} cycling in
                      calcareous forest soils},
      journal      = {Geoderma},
      volume       = {375},
      issn         = {0016-7061},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {FZJ-2020-04428},
      pages        = {114507 -},
      year         = {2020},
      abstract     = {Dissolved and colloidal phosphorus (P) represent the mobile
                      P fractions in soils, but their role in P cycling in forests
                      is still largely unclear. In this study of four calcareous
                      forest soil profiles, the elemental compositions of
                      different size fractions of water dispersible colloids (WDC)
                      were investigated by asymmetric field flow fractionation.
                      Nuclear magnetic resonance spectroscopy (NMR) was applied to
                      identify the organic P compounds in soils, WDC, and soil
                      solutions. Carbon was the dominant element in WDC of all
                      soil horizons, including mineral soils that were rich in Ca
                      or Si. Although chemical composition of P varied
                      dramatically with increasing depth, the colloidal P
                      composition remained unchanged. This contrasting difference
                      between mineral soil and its WDC fraction indicated that the
                      colloids were not locally generated but originated from the
                      overlying organic soil horizons. Carbonate minerals were
                      unlikely involved in colloid formation under acidic
                      condition. Instead, Ca2+ probably drove colloid formation by
                      bridging organic matter, including P-containing compounds
                      released from litter degradation. Colloid formation was
                      influenced by climate, vegetation, and soil characteristics.
                      No dissolved P was detected in deeper mineral soil horizons
                      due to efficient retention by Ca minerals. Colloidal P was
                      still present in deeper soil layers and thus of significance
                      for potential P vertical transfer.},
      cin          = {IBG-3},
      ddc          = {910},
      cid          = {I:(DE-Juel1)IBG-3-20101118},
      pnm          = {255 - Terrestrial Systems: From Observation to Prediction
                      (POF3-255)},
      pid          = {G:(DE-HGF)POF3-255},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000551513100014},
      doi          = {10.1016/j.geoderma.2020.114507},
      url          = {https://juser.fz-juelich.de/record/887798},
}